. Railway mechanical engineer . rse handle is adjustableto suit the operator. As a safety feature, the crank handlecannot be engaged when the rapid power traverse is adjustments are provided for both heads. The hou.^ings are of box type construction and extend to thebottom of the bed. They are held in alinenunt with the bedby a tongue and grove. All gearing is completely coveredand the steel feed racks have teeth cut the entire length. The travel of the tool bar is 27 in. Eight feeds are pro-vided, ranging from 1/40 in. to ^ in., and the range oftable speeds is from to
. Railway mechanical engineer . rse handle is adjustableto suit the operator. As a safety feature, the crank handlecannot be engaged when the rapid power traverse is adjustments are provided for both heads. The hou.^ings are of box type construction and extend to thebottom of the bed. They are held in alinenunt with the bedby a tongue and grove. All gearing is completely coveredand the steel feed racks have teeth cut the entire length. The travel of the tool bar is 27 in. Eight feeds are pro-vided, ranging from 1/40 in. to ^ in., and the range oftable speeds is from to for the 42-in. size, to for the 48-in. size. A 10-hp. motor is requiredto drive either of these boring , and if direct current isavailable, a 2 to 1 variable speed motor, not exceeding 500to 1,000 r. p. m. is recommended. For variable speedmotor drive, the cone pulleys are omitted and a single beltdrive used instead. The motor is mounted on top of thearch and coupled directly to the driving shaft, as shown in. Cincinnati Boring Mill Built In 42-In. and 48-ln. Sizes the illustration. Boring mills of this t}pe can be equippedwith countershaft drive and a belt shifter, if desired. Theycan also be furnished with a constant speed motor on thearch, in place of the tight and loose pulleys. Ease of manipulation and the proper placing of all con-trol handles has been constantly kept in mind in the designof these 42-in. and 48-in. boring mills, and all unnecessarysteps around the machine have been eliminated. LAVOIE AIR CHUCK About four years ago an air chuck was developed in alarge manufacturing plant which was producing war ma-terial, and was the means of turning out a large productionof small lathe work. This air chuck proved so satisfactoryin operation that steps were taken to cormnercialize it, andit is now being manufactured by the Frontier Chuck &Tool Company^ Buffalo, N. Y. While this chuck has beenmanufactured for only about six montlis, it is by no meansa new
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
